Method of forming containers



ROOM

July 12, 1938. R. M. BERGSTEIN METHOD OF FORMING CONTAINERS OriginalFiled .xuia, 19:6

2 Sheets-Shut 1 INVENTOR. JPOJE/P 7- Mome/a Etna rznv.

BY M

ATTORNEYS.

y 1938. R. M. amass-ram Re. 20,789

IETI'IOD or roume coummnas ori i'nal Filod July 8, 1936 2 Sheets-Shut 2INVENTOR. 1P oanrr Mam/s Bamsrcm.

ATTORNEYS.

Reissued July 12, 1938 2am METHOD or some commas Robert M. Bergstein,Cincinnati, Ohio, assignor :ggfdna May Benstein and himself, as trus-Original No. 2,085,910. dated October 12. 1937,- Serial No. 89,539, July8, 1938. Application for reissue April 28, 1938, Serial No. 204,382

18 Claims. .(Cl. 9386.01)

My invention relates to a mode oi providing terial as is made fromrubber, known as Pliciilm, cartons with bags enclosed therein, whichcartons in the second of the above practices, because of areparticularly adapted for shipment in knocked the mechanical diflicultiesof manipulating them. down form or flat folded condition, and for subse-Among other advantages incident to my method quent use in the packagingof oil or other liquid of forming a bag within a box; is the fact orgreasy substances, orwhere air tight and that since I form both the bagand the box in moisture proof packaging is required. flat condition, Ican apply pressure very readily This application relates to the processaspects to the completed structure during the period of my application,Serial No. 43,569, iiled Oct. 4. necessary for adhesion of the bag tothe interior 1935, and "lustre-tins a so ce ta n Subject matter of thebox, which adhesion is very desirable, since contained in my pp n B 24.filed it results in a bag being opened when the carton February 4, 1936.is squared up ready for the reception of its The product, which Iproduce in accordance t t with the method herein described, can beformed o of t advantages of my th 1 t t t either by hand or machine asan initially flat conpermits me t employ in t manufacture of t tcomprising a Ou t u r e 'bag or pouch element of the completedstructure, structure made of relatively stiff material, and an amaterial hi 1 h t l l constituting inner i epe de y D ormed flat po ceither the entire structure or the fused together h s. the liner b61118enclosed and adhesive!!! interior of the completed pouch or bag. An ex-20 tened to the inner surface of the outer structure ample of suchmaterial is sheeted rubber hydroin flat fo and t belns adapted forerection chloride, which I understand to be the composiand filling atthe point of use by the same maniption a product which has become knownon ulations customarily practiced in the trade, tothe market by thetrade name f pn gether with the heat sealing of the ripaen rgouth1 oi!In the drawings; the package or bag, after contents ve een nsertedtherein, independently oi the closing of the 5 5; flf f fiz f ffiggffifimode of mo closure flaps oi the outer structure. Fl 2 is rs ecu e m tingt 1 th Introduction of liners into cartons has been h pe i ti 5 8p n epracticed in several ways, one of which is merely proce aiccor n5 my tofasten a liner sheet, uniormed, to the inner 3 illustrates the completedproductsurface of the carton material, including closure 4 illustratesthe P o when sell p and flaps. Another practice is to pre-form a liner,in em? for mungerect form, about a mandrel and push the Fig. 5illustrates the heat sealing of the completed and filled package.

drel with the pre-formed erect liner into the erected carton, therebyinserting the liner. The Fig. 6 illustrates another form of carton.

defect of the first oi these two practices is that Fig. 7 illustrates amode of application of the independent closures of the liner at eitherend 01' bag thereto. the carton, either before or after the contentsFig.8, the completed structure. have been inserted, are not possible.The defect In producin my n0ve1 structure t is highly of the second ofthe above two practices is that advantageous to follow the process whichI will the user of the package is required to perform primarily e. ndwhich can be followed by the operation of forming the liner in erectform', the use of automatic machinery of which variand after it is soformed, introduce same into ous forms will be adaptable. I have producederected carton, and in this practice it is impraca machine for carryingout the method which tical, if not impossible, to form tight seams, soas will be described and the 'novel features oi which to bring about ahermetically sealed package, to will be set forth in a companionapplication. provide the maximum protection fo the con- I Will describe8. practice with reference t0 tents, and furthermore the liner cannot beproa Ordinary Carton. a Wa ed tubular vided to ilt snugly into theinterior of the carton, structure made in flat form, with closin fl pand cannot b fully t i d t ,11 points in at both ends, and which isshipped flat and when used is opened, the flaps closed at the bottom,the contents introduced and the flaps then closed at the top. The formillustrated will be one wherein the closing flaps are adhesively securedin closed position. This is of course, but one holding the contentsthereof by the relatively stronger material of the carton within whichit is placed. Also, it has been found impractical, if not impossible, touse relatively thin or flimsy 66 material, such as cellulose sheeting,or such mathereof, these strips to be used for sealing the ends andseams of the bag material, or a com-' plete coating of a protectivematerial, portions of which would be used to form joints, whether on theside or the end of the tube thereof; this would-be merely an additionalstep, which step has already been described in my co-pending cases towhich reference has been made above.

The practice as described starts with one or more continuous strips orrolls of either fusible transparent or non-transparent material, or anon-fusible material having a fusible ccating applied to the innersurface of the tube material and with carbon blanks which havepreviously been prepared, cut and scored, printed or unprinted. I haveillustrated such blank as I, having side walls 2 and 3, end walls 4 and5, and glue flap 6, and closing flaps 1, for one end and 8 for the otherend. These blanks are fed one by one along a conveyor.

The sheet 9 of material is caused to pass over a forming plate, overwhich it is folded to form a lap III.

In the diagram it is indicated that a hot roll bears on the lapped overportions and serves to fuse them into an impermeable sealed seam i0, andto make a tube of the material. The illustration indicating the heatsealing practice is intended to be diagrammatic, various practices beingpossible.

The tube is caused to move along, as by feed rollers, until it comes toa point where a heated iron is pressed across it at spaced intervals,causing the end portions of the tube material to be come permanentlycombined; where a nonfusible material is used and a fusible coating isapplied to restricted or pre-determined internal areas, namely: what isto be the end of the tube, the sealing by means of a heated ironoperation is synchronized and co-ordinated with the predetermined coatedsurfaces. Where the entire internal surface is coated with said fusiblematerial, such synchronization is not essential, as the iron will fusethe material wherever contact is made.

The tube is still drawn along by feed rollers until it comes to a flyknife of suitable construction, which cuts the tube adjacent thetransverse sealed portion. It may be advantageous with some materials tocut across the material incompletely to facilitate further feeding. Thistransverse cut is illustrated at II.

It can be noted that so far provision has been made for forming acontinuous tube, with sections of desired length, having their one endsealed shut, but still clinging together for feeding purposes. In theillustrated example the bags formed of the tube sections are combinedwith the carton.

As each carton blank is fed along it is passed through glue wheels whichapply adhesive to the under side of the glue flap 8, and also applyadhesive as illustrated in the form of spots or small areas I3, near thetrailing end of the blanks on upper side, or inside walls of carton, onthe iii; i. has;

two side walls 2 and J, and on-the two end walls I and I. Instead ofspots, lines of adhesive could-be employed.

Suitable feed rolls engage the tube material close to the point where itis to be applied to the carton blank. This feed will be more rapid thanthe delivery from the knife, which may, if desired, be followed by afeed device causing .the tube to move at its previous speed. The pull ofthe more rapid feed will serve to break apart the connecting portionsleft by the nicks in the knife, and supply individual bags with theirsealed end foremost to the carton blanks. Since the blanks mustnecessarily be spaced in feeding, for accuracy in operations, and sincethe original tube is formed continuously, this pick up in the speed ofmovement in the bags will compensate for the spacing of the cartonblanks.

The delivery of the bag being synchronizedwith the movement of thecarton, it will be deposited upon the walls 3 and 4, the length of thebag being slightly larger in dimension will overlap score lines,separating wall panels and adjacent panels. The bag can thereafter beretained in position on the moving carton by means of rolls holding samedown, and, in addition thereto, lines or spots of adhesive, causing thebag to cling to the carton.

.The usual practice of forming the tubular carton then takes place byfolding the wall 2 and glue flap 8 of the carton, and then turning theend wall 5 over the edge thereof to overlap the glue flap 6. Thisoperation also brings the spots of glue on the side wall 2 and the endwall 5 against the bag, so that it is adhesively secured,

to all four walls. Ordinarily the length of the bag will be such thatits open end does not pro- .iect beyond the closing flaps I at thetrailing end. of the carton. With the very flexible, light material itis decided advantage to apply the sealed and to the carton in advance,because this is the least flimsy portion of the bag. With other materialit will be subject to the wishes of theoperator whether the cross seamsbe cut on ahead 'or behind the moving tube.

As so far described, I have produced a carton of the usual type with abag sealed in a simple seam into a tube lengthwise of the carton, withits end sealed shut, and with adhesive holding the material of the bagto the carton walls. I

' prefer that the bag be a little oversize, i. e., larger than theinside of the carton, and have so illustrated it. This will permit thebag to find support throughout in the carton. To this end it may also bedesirable to lay the closed seam further over the ultimate bottomclosing flaps of the carton than I have illustrated, so as to result inultimate bottom support for the contents of the bag if this isnecessary.

While I have shown a single seam lapped seam tube; it is equally as easyto use two strips of paper and fold one of them over the other at eachside of the tube former, which is a well known way of making a lappedseam tube.

The carton is then ready for shipment, and looks on the outside like anyother carton.

Instead of making the bag entirely of heat fusible material, anothermode of procedure is to employ for a bag a sheet of some suitableflexible material such as paper, and adhesively secure thereto the heatfusible sheet, except for a projecting portion which is used for heatsealing the inner sheet to itself along a different line than the papermaterial of the bag is secured.

cones Also it is withinthe scope of my invention to form any kind of aflat bag, whether of heat sealable or impermeable material or not, andassociated in a manner noted with the carton.

It would of course, also be practical to supply to an operative asuccession of out and scored blanks, and a succession of flat bags andhave her secure the bags by hand within the boxes prior to gluing theboxes themselves, re-

sulting in a completed flat article with the flat pouch within it. Ihave spoken of applying pressure to the completed article to secure theadhesion between the pouch and the carton, but the ordinary cartonmanufacturing machinery will perform this operation. Also since thepackages are formed in the flat, successive boxes can be stacked in somesort, of container, thus holding the adhesive iunctures together foranextended period until the boxes are removed at point of use, fromwhatever container they are packed in.

Referring briefly to the alternative style of carton, I have shown inFig. 6, a carton blank having what may be termed side walls 2| and 22,end walls 2! and 24, and closing flaps 26, 21, 28, 29. 30, 3| and 32,II, for the several walls, at both ends of the structure- There is alsoa glue flap 2! used in closing the carton.

The distinctive feature of this carton lies in the fact that the endwalls 23, ll are formed with a crease or fold line ab, ed, and in theoperation of forming the completed article, it is folded about the bagon the said lines ab, ed. In this construction I have illustrated thepanels of adhesive at e and f, on what I have termed the side walls ofthe final structure. In following out my practice, the pouch 34 will bedeposited on the carton blank while the same is fiat, and thereupon thecarton will be folded over on the lines ab, cd, and the closing flap IIwill be secured either under or on top of the edge of the wall 22.

Although the practice is the same in this construction in its essentialdetails, the completed article is different .in that when the structureis erected, the faces of the bag will be drawn apart in parallel planes,because the walls 2| and 22' carton and the bag that-the bottom is freeto be pulled into a flat condition across the end of the carton when thestructure is erected.

The advantages of the several structures noted in industrial use arecovered at some length in my co-pending applications, Ser. Nos. 43,569,and 62,324, to which reference has hitherto been made.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent, is:-

1. That method of container manufacture which consists in providing cutand creased carton blanks, forming ilat bags closed at one end, andthereafter depositing them in desired position on the blanks while flat,there being adhe-' sive interposed between the blank and the bag, andthen folding the blanks into a flat form and fastening the overlappingedges thereof, whereby a flat container is formed with the bag in placetherein and adhesively secured therein.

2. That method of container manufacture which consists in providing flattubular bag material, having heat fusible portions, cutting the tubeinto bag sections and heat fusing the one end of each section to form aflatbag closed at one end, providing cut and creased carton blanks,depositing the bags on the blanks and in the presence of adhesivefolding over and adhesively' securing the blanks into fiat tubularbodies about the bags, for the purpose described.

3. That method of container manufacture which consists in providinglapped seam tubes in flatbag length sections, sealed together at oneend, thereafter depositing the flat bags so formed on carton blanksprior to folding same into tubular form, and then folding and gluing thecarton blanks.

4. That method of container manufacture which consists in providinglapped seam tubes in flat bag length sections, sealed together at onethe end of the blank over which the closed end of the bags lie, and thenfolding over the blanks and adhesively securing the overlapping portionsthereof.

6. That method of container manufacture which consists in providing cutand creased carton blanks, forming fiat bags closed at one end, anddepositing them in desired position on the blanks while unfolded, therebeing adhesive interposed between the blank and the bag, and thenfolding the blanks into a flat tubular form and fastening theoverlapping edges thereof, whereby a flat container is formed with thebag in place therein and adhesively secured therein, said adhesive beingapplied to engage the bag and at least two opposite panels of thecarton.

7. That method of container manufacture which consists in providing flattubular bag material, having heat fusible portions, cutting the tubeinto bag sections and heat fusing the one end of each section to form aflat bag closed at one end, providing cut and creased carton blanks,depositing the bags on the blanks and in the presence of adhesivefolding over and adhesively securing the blanks into fiat tubular bodiesabout the bags, for the purpose described, said adhesive being appliedto engage the bag and at least two opposite panels .of the carton.

8. That method of container manufacture which consists in providinglapped seam tubes in flat bag length sections, sealed together at oneend, thereafter depositing the flat bags so formed on carton blanksprior to folding sameinto tubular form, and then closing and gluing thecarton blanks, adhesive being supplied to secure the bags to the cartonblanks, said adhesive being applied to engage the bag and at least twoopposite panels of the carton,

9. That method of container manufacture which consists in providing fiatbags closed at one end, providing cut and scored carton blanks, anddepositing the bags on the blanks while both bags and blanks are fiat inposition to overlie the blanks while both bags and blanks are flat,there being adhesive interposed between the blank and the bag, and thenclosing the blanksinto a flat form and cementing the overlapping edgesthereof, whereby a flat container is formed with the bag in placetherein and adhesively secured therein, pressure being applied to theresulting flat article to secure adhesion of the carton an bag.

11. That method of container manufacture which consists in providingflat tubular bag material, having heat fusible portions, cutting thetube into bag sections and heat fusing the one end of each section toform a flat bag closed at one end, providing cut and creased cartonblanks, depositing the bags on the blanks and in the presence ofadhesive folding over and adhesively securing the blanks into flattubular bodies about the bags, for the purpose described, pressure beingapplied to the resulting flat article to secure adhesion of the cartonand bag.

12. That method of container manufacture which consists in providinglapped seam tubes in flat bag length sections, sealed together at oneend, thereafter depositing the flat bags so formed on carton blanksprior to folding same into tubular form, and then closing and gluing thecarton blanks, adhesive being supplied to secure the bags to the cartonblanks, pressure being applied to the resulting flat article to secureadhesion of the carton and bag. 4

13. That method of container manufacture which consists in providingflat bags closed at one end, providing cut and scored carton blanks,

- and depositing the bags on the blanks while both bags and blanks areflat in position to overlie the closing flaps at the end of the blankover which the closed end of the bags lie, and then folding over theblanks and adheslvely securing the overlapping portions thcreof,adhesive being applied between the body of the blank and the bag, andpressure being applied to the resulting flat article to secure adhesionof the carton and bag.

14. That method of container manufacture which consists in depositing aformed fiat tubular liner in a predetermined position on a flat cartonblank and thereafter folding the blank and securing the opposite edgesof the same to close the carton about the liner.

15. That method of container manufacture which comprises providing cutand scored carton blanks. said blanks having intermediate fold lines ontwo opposite side panels of the blank, providing flat bags closed at oneend, and depositing said bags in desired position on the blanks whileflat, there being adhesive applied so as to securethe bags at least tothe other two side panels of the blank, and then folding the blanks I onthe said intermediate fold lines and fastening the overlapping edges ofthe blank, whereby a flat container is provided with a bag adhesivelysecured in place therein.

18. The method of, container manufacture which consists in depositing aformed flat tubular liner in a predetermined position on a flat cartonblank and thereafter folding the blank and securing the opposite edgesof the same to close the carton about the liner, adhesive being suppliedto secure the liner to the carton blank at two opposite walls thereof atleast, so that when the carton is opened, the liner will be opened.

17. That method of container manufacture which consists in depositing aformed fiat tubular liner in a predetermined position on a flat cartonblank and thereafter folding the blank and securing the opposite edgesof the same to close the carton about the liner, said liner being of alength and so deposited upon the flat carton blank that its ends overliethe closing flaps of the carton blank at both ends of said blank.

18. That method of container manufacture which consists in depositing aformed flat tubular liner in a predetermined position on a flat cartonblank and thereafter folding the blank and securing the opposite edgesof the same to close the carton about the liner, said tubular linerhaving a lengthwiseheat fused seam therein prior to deposit on thecarton blank, and the interior at least being of heat fmible material.

ROBERT M.

